/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineIdentityInterface.h
Called when user account login has completed after calling Login() or AutoLogin()
typedef TMulticastDelegate_FourParams< void, int32, bool, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) &, const [FString](API\Runtime\Core\Containers\FString) & > FOnLoginComplete